IMPORTANT
How to Determine Spa Pump Plumbing Size
by measuring O.D. of wet end male threads
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Pump plumbing sizes are nominal, and not actual outside diameter (OD) of the threaded intake or discharge. Use a tape measure and check your old pump thread size against this sizing table for most* spa pump brands: |
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Plumbing Size
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Pump Thread O.D. (approx.)
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1.5″
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2-3/8″
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2.0″
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3″
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2.5″
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3-5/8″
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*Some brands of hot tub spa pumps (such as Hayward, Jacuzzi, and Sta-Rite) use non-standard fittings with different dimensions. Please contact our Parts Help desk if you need assistance with these. 210-650-4034 or sales@waterwayparts.com
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